JP2000140005A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an easily producible absorbent article which achieves a higher effect especially for the prevention of spillage from a crotch part by not only holding excrement being separated but also blocking the spillage thereof to prevent possible dermatitis of the like. SOLUTION: This article includes a liquid permeable top sheet 13, a liquid impermeable back sheet, a first absorbing body arranged therebetween and a pair of pocket sheets 15R and 15L which are arranged along the longitudinal direction of the first absorbing body while side rim parts thereof outside across the width thereof are joined on the top sheet 13. Each one end part in the longitudinal direction of the pair of pocket sheets 15R and 15L is joined at one end part in the longitudinal direction of the top sheet 13 in a state where side rim parts inside across the width thereof are laminated on each other and the side rim parts inside across the with thereof to the other end part from a joint part of each one end part in the longitudinal direction of the pair of pocket sheets 15R and 15L are separated from each other to form an opening part 25. A pair of second absorbing bodies 16R and 16L are arranged protruding to the side of the first absorbing body from the side rim parts outside across the width of the pair of pocket sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article capable of holding excrement in a separated state and preventing leakage of the excrement.

[0002]

2. Description of the Related Art Conventionally, in an absorbent article for treating excretions such as urine, menstrual blood, and stool, if the excretion is discharged at a speed higher than the absorption rate of the absorber, or if the stool is absorbed with high viscosity. When excretion is difficult, the absorbent cannot absorb the excretion, and may leak from the central part or the back side of the absorbent article.

In order to eliminate these leaks, Japanese Patent Publication No. 6-93901 proposes an absorbent article in which elastic barrier cuffs are arranged at both ends in the longitudinal direction. This absorbent article has a so-called three-dimensional gather rising from the side edge of the absorber, and the three-dimensional gather prevents leakage of excrement.

Japanese Patent Application Laid-Open No. 64-26701 discloses a structure in which a flap is provided on the back and abdomen in order to eliminate leakage of the absorbent article from the back and abdomen.

Further, Japanese Patent Application Laid-Open No. 3-59 discloses a structure in which a part of a three-dimensional gather is adhered to a side edge of an absorber so that the three-dimensional gather can be reliably raised. I have. The three-dimensional gather of the absorbent article rises from the absorber not only due to the expansion and contraction of the elastic body arranged at its free edge, but also due to the difference in the longitudinal dimension between the three-dimensional gather and the absorber, and the longitudinal direction of the absorbent article Prevents leakage from the center.

On the other hand, Japanese Patent Application Laid-Open No. 4-300543 discloses a second top sheet having a U-shaped opening at the top of an absorbent article in order to prevent leakage from the center and back of the absorbent article. An arrangement is disclosed. This absorbent article has a so-called pocket structure, and the integral second top sheet rising from the absorber serves as a barrier so that the excrement discharged in the first top sheet does not leak out. .

[0007]

[Problems to be solved by the invention] Japanese Patent Publication No. 6-9390
The one disclosed in Japanese Patent Publication No. 1 only prevents leakage of the absorbent article from the width direction. Also, depending on the posture of the wearer, it is conceivable that the three-dimensional gathers of the absorbent article are crushed and do not rise from the absorber, and the effect of preventing leakage is insufficient.

Further, in the device disclosed in JP-A-64-26701, the flap is effective only for preventing the absorbent article from leaking from the back and abdomen, and cannot prevent the absorbent article from leaking from the central portion. . Moreover, depending on the posture of the wearer, the flap may be crushed, and excrement may leak over the flap.

[0009] Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 3-59, it is difficult to prevent the excrement from leaking from the back side of the absorbent article.

On the other hand, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-300543, it is necessary to have a lifting means below the second top sheet in order to make the second top sheet rise above the absorber. Further, in order to improve the rising of the second top sheet, it is desirable to dispose the elastic body over the entire periphery of the U-shaped pocket. However, it is desired to arrange this elastic body in a U-shape along the pocket. Then
The production speed of the absorbent article decreases, and the production cost increases. Conversely, when the elastic body is arranged only in the longitudinal direction of the absorbent article, the production is easy, but the second top sheet on the back side is insufficiently raised. In addition, the production speed is reduced due to the cutting and removal of the sheet in the pocket portion of the second top sheet.

[0011]

An object of the present invention is to prevent excretion and the like by preventing excretion from occurring, by keeping excretions separated and preventing them from leaking. An object of the present invention is to provide an absorbent article that is expensive and easy to manufacture.

[0012]

Means for Solving the Problems An absorbent article according to the present invention comprises a liquid-permeable topsheet, a liquid-impermeable backsheet, and a first absorbent sheet disposed between the topsheet and the backsheet. And a pair of pocket sheets arranged along the longitudinal direction of the first absorbent body and having a widthwise outer side edge joined to at least one of the top sheet and the back sheet. An absorbent article, wherein one end in the longitudinal direction of the pair of pocket sheets is joined to at least one end in the longitudinal direction of the top sheet in a state in which side edges on the widthwise inner side are overlapped with each other. An opening is formed in which the widthwise inner side edges of the pair of pocket sheets from the joining portion at one longitudinal end to the other end of the pocket sheet are separated from each other,
A pair of second absorbers protruding from the outside in the width direction of the pair of pocket sheets toward the first absorber are attached to the pocket sheets along the longitudinal direction of the opening. .

According to the present invention, the widthwise outer side edges of the pair of pocket sheets are joined to the top sheet, the back sheet, or both along the longitudinal direction. Are joined to at least one longitudinal end of the top sheet in a state in which the widthwise inner side edges are overlapped with each other, and the widthwise inner side edges of these pocket sheets are separated from each other to form an opening. Therefore, the first absorber is surrounded from three sides by the pocket sheet dam forming the pocket structure.

Further, a pair of second absorbers are disposed inside the opening, that is, inside the weir, and the presence of the second absorber suppresses the fall of the weir to the outside and rises from the top sheet. , Protruding from the first absorber.

Therefore, regardless of the posture of the wearer, the excrement of the wearer is received by the first absorbent body and the second absorbent body through the opening, and the pocket structure described above allows the excrement not only from the crotch part but also from the back part. The excrement is also reliably prevented from leaking, and these excretions are kept separated.

[0016] In the absorbent article according to the present invention, it is preferable that the widthwise inner sides of the pair of pocket sheets are turned outwardly to provide joints which are joined to each other, and these joints form an opening. In this case, it is preferable to adopt a configuration in which the second absorber is accommodated in the folded portion of the joint.

The joining portion is formed at a boundary portion between the joining region and the non-joining region along the longitudinal direction of the top sheet and the pocket sheet, that is, at a width inner side than a rising portion when the pocket sheet is separated from the top sheet. It may be formed on the pocket sheet, may be formed at the position of the upright portion, or may be formed outside the upright portion in the width direction.

As described above, by providing the joint,
Even if the length of the top sheet and the back sheet in the longitudinal direction is the same as the length of the inside of the pocket sheet in the width direction, the inside of the pocket sheet in the width direction is curved from one longitudinal end to the other end. As a result, the pocket sheet is pulled by the top sheet and the back sheet, and as a result, the side edge on the inner side in the width direction of the pocket sheet rises from the peripheral edge of the absorber.

It is also effective to dispose an elastic member in an extended state along the longitudinal direction at a side edge on the inner side in the width direction of the pair of pocket sheets, or to form the pair of pocket sheets by an elastic member. It is. Also in this case, similarly, the tendency of the side edge portion in the width direction of the pocket sheet to rise from the peripheral edge portion of the absorber can be further increased by utilizing the contracting force of the elastic member or the elastic member.

Further, an auxiliary sheet may be further provided to be overlapped on one longitudinal end of the pair of pocket sheets.

[0021]

Next, the present invention will be described in detail with reference to examples.

[0022]

EXAMPLES A plurality of examples in which the absorbent article according to the present invention is applied to an expandable diaper will be described in detail with reference to FIGS. 1 to 11, but the present invention is limited to such expandable diapers. is not.

As shown in FIG. 1 showing the appearance of this embodiment, FIG. 2 showing its plan shape, and FIG. 3 showing its cross-sectional structure taken along the line III-III, the unfolded diaper 11 of this embodiment is
The liquid-impermeable back sheet 12 and the back sheet 1
Liquid-permeable topsheet 13 superimposed on 2
And a first absorbent body 14 disposed between the top sheet 13 and the back sheet 12, and arranged along the longitudinal direction on both sides in the width direction of the first absorbent body 14, and side edges outside the width direction thereof And a pair of pocket sheets 15R and 15L whose one end in the longitudinal direction is joined to the top sheet 13, and the first absorber 1 wrapped by the pocket sheets 15R and 15L.
4, a pair of second absorbers 16R, 1 arranged on both sides in the width direction.
6L, a pair of side flap portions 17 and 18 formed by a top sheet 13 and a back sheet 12 extending outward from both side edges in the width direction of the first absorber 14, and the first absorber 1
4, an elastic member 20 around the waist for forming a waist gather 19 that is sandwiched between the top sheet 13 and the back sheet 12 extending from one end in the longitudinal direction of the waist and improves the fit around the waist when worn. Side flap portions 17, 1 outside the both side edges in the width direction of the first absorber 14
And a side flap on one end side for forming leg gathers 21 sandwiched between the top sheet 13 and the back sheet 12 forming the legs 8 to improve the fit around the legs when worn. It has a pair of left and right fastening tapes 23 that are attached to both side edges in the width direction of the portion 17 and overlap the side flap portions 18 on the other end side to connect them.

In this case, a pair of pocket sheets 15R,
In the vicinity of the outer side edge of the width direction of the 15L, the joining portions 24R and 24L formed up to the end of the abdomen along the longitudinal direction allow the widthwise inner side edges of the pair of pocket sheets 15R and 15L to be formed. Pocket seat 15 on three sides separated from each other
An opening 25 surrounded by R and 15L is formed.

In this embodiment, the joints 24R and 24L are formed in a continuous straight line from the longitudinal center to the ventral side of the pocket sheets 15R and 15L. The diaper 11 may be arranged in
May be provided over the entire length.

Elastic member 2 around waist in this embodiment
Although 0 is arranged only on one end side in the longitudinal direction of the first absorber 14, it may be arranged on the other end side in the longitudinal direction. The leg-surrounding elastic member 22 is connected to the first absorber 14.
It is provided only near the center in the longitudinal direction of the diaper along the longitudinal direction outside of both side edges of the diaper, and further, between the side flap portions 17 and 18, for forming an opening around the leg when worn. A pair of cutouts 26 are formed.

Further, the fastening tape 23 can be repeatedly peeled off from the base tape 27 joined on the top sheet 13.

The above-mentioned top sheet 13 is formed of a hydrophilic or hydrophobic non-woven fabric, woven fabric, porous plastic film, or the like, and is made of fibers such as polypropylene, polyethylene, polyester, nylon, or polyester, polypropylene, polyethylene, nylon. And the like can be composed of a composite fiber or the like obtained by combining two or more types. In particular, low-melting polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are not limited thereto. The top sheet 13 does not need to be formed of a single sheet, but is divided into a center top sheet to be overlaid on the first absorber 14 and a pair of side top sheets forming the side flap portions 17 and 18. You may do so. In this case, different materials may be used for the center top sheet and the side top sheet, but it is also possible to use the same material.

The back sheet 12 may be formed of a liquid-impermeable film such as polyethylene, or may be formed by laminating a liquid-impermeable film with a nonwoven fabric or a woven fabric. It is preferable to use a material having

The first absorber 14 and the second absorber 16R, 1
6L is formed of a known absorbent material used for already known absorbent articles. That is, absorbent fibers such as cotton-like pulp and rayon are matted, and a superabsorbent polymer (hereinafter, referred to as SAP) is uniformly dispersed or arranged in a layer, and wrapped with a hydrophilic sheet. SAP
Wrapped in a hydrophilic sheet. Alternatively, 3 to 60% by weight of a heat-fusible substance may be mixed with the cotton-like pulp, and these may be thermocompression-bonded.

The above-mentioned cotton-like pulp preferably has a fiber length of 5 mm or less obtained by defibrating a chemical pulp sheet or a mechanical pulp sheet with a crusher. The raw material for the pulp is not limited to softwood, but hardwood, straw, bamboo, kenaf, and used paper pulp can also be used. The amount of the cotton-like pulp used depends on the structure of the first absorbent body 14, for example, whether the cotton-like pulp is used alone, a plurality of the cotton-like pulp are used, or another material such as SAP is used in combination. Different, but generally 50-400 g / m ²
Is appropriate.

As the SAP, starch, cellulose, or synthetic polymer can be used. Specifically, starch-acrylic acid (salt) graft copolymer, saponified starch-ethyl acrylate graft copolymer, saponified starch-methyl methacrylate graft copolymer, starch-acrylonitrile graft copolymer Crosslinked with saponified product of starch, saponified product of starch-acrylamide graft copolymer, saponified product of starch-acrylonitrile-2-acrylamido-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, acrylic acid Such as polyethylene oxide, crosslinked products of sodium carboxymethyl cellulose, and crosslinked products of polyvinyl alcohol-maleic anhydride reactant. In particular, those based on sodium polyacrylate,
It is most suitable because it absorbs urine, bodily fluids and water more than 20 times its own weight. The amount of the SAP used is 10 to 500% by weight, preferably 15 to 300% by weight based on the total weight of the dry cotton-like pulp, and is substantially uniformly distributed in the cotton-like pulp. It is valid. This first
In the case of compression-molding the absorbent body 14, the surface is molded smoothly so that the density becomes uniform, or the surface is subjected to embossing for guiding urine and body fluid in the vertical and oblique directions,
The density may be partially different.

Further, as the above-mentioned hydrophilic sheet,
Tissue, absorbent paper, hydrophilic nonwoven fabric, etc. can be used.

The top sheet 13 and the first absorber 14
A diffusion layer formed of a hydrophilic and liquid-permeable nonwoven fabric, woven fabric, porous plastic, cotton-like pulp, or the like may be provided therebetween. By providing this diffusion layer, it is possible to prevent the leakage of urine and body fluid without lowering the absorption rate. This diffusion layer can be composed of fibers such as polypropylene, polyethylene, polyester, rayon, and pulp, or can be composed of a composite fiber of these, and is fixed to the absorber 14 using an adhesive or the like. .

In this embodiment, the pair of pocket sheets 15R and 15L are joined to the top sheet 13 in a state where one end in the longitudinal direction is overlapped with each other at the center along the longitudinal direction of the first absorber 14. However, it may be joined to the back sheet 12, and in this case, liquid leakage from the liquid-permeable top sheet 13 can be prevented. The side edges of the pocket sheets 15R and 15L on the outside in the width direction are also joined to the top sheet 13. The overlap width of the pair of pocket sheets 15R and 15L is preferably set to 2 mm or more, and a part of the overlapped portion may be joined to each other.

Further, joining portions 24R and 24L are formed along the longitudinal direction from the central portion in the longitudinal direction to the ventral side of the pocket sheets 15R and 15L, respectively. These joints 24R, 24L are connected to the pocket sheets 15R, 15L.
While forming the inner side edge in the width direction, that is, the folded portion 29, the free end portion 28 is folded back outward in the width direction, and a part of the mutually overlapping surfaces is joined linearly along the longitudinal direction. Formed by These joints 24R, 24L allow pocket sheets 15R, 1
An opening 25 is provided in 5L, and a pocket sheet 15R,
The length in the longitudinal direction of 15L becomes shorter than the length in the longitudinal direction of the first absorber 14, and the first absorber 14 is urged in an arc shape.
(Bent). As a result, the pocket sheets 15R, 15R
L rises from the first absorber 14 to form a weir.

The size of the second absorbers 16R and 16L is determined by the absorption capacity at the crotch part of the wearer in the case of a so-called hourglass type in which the center of the first absorber 14 is constricted as in this embodiment. Is preferably large enough to compensate for In particular, in the case where the hourglass-shaped first absorber 14 is stamped out of a rectangular material and manufactured, the portions remaining in an arc shape are the second absorbers 16R and 16R.
L can be used as it is, eliminating waste during manufacture and obtaining good fit.

However, the shape of the first absorber 14 need not be an hourglass, but may be a rectangle or a T-shape.
Since the crotch portion where the absorbers 16R and 16L are disposed requires higher absorption capacity, the crotch portion is formed to be thicker than the first absorber 14 or a material having a relatively higher absorption capacity than the first absorber 14. May be configured. In addition, the second absorbers 16R and 16L may be arranged in such a manner as to be generally biased toward the abdominal part where urine distribution is high. In particular, these second absorbers 16R, 16L
Since there is a tendency that the surface area is increased by being wrapped in the pocket sheets 15R and 15L, it is also effective to use only SAP so as not to be bulky and to reduce discomfort when worn.

The joints 24R and 24L are located from the vicinity of the central portion in the longitudinal direction of the pocket sheets 15R and 15L to the abdomen, that is, the portions corresponding to the wearer's crotch and the abdomen. 15R, 15L
The inner side edge side in the width direction, that is, the free edge end portion 28 side of the second absorber 16R, the inner side edge side in the width direction thereof, that is, the free edge end portion 28 side is wrapped around the second absorber 16R, 16L. 1
6R and 16L are formed by folding back outwardly in the width direction so as to enclose them and joining a part of the mutually overlapping surfaces linearly along the longitudinal direction. As a result, the second absorbers 16R and 16L are
R and 15L are wrapped in the folded portion 29. In this case, one end or both ends in the longitudinal direction of the second absorbers 16R and 16L located on the side opposite to the waist gather 19 (the ventral side of the deployable diaper 11) may be joined to the top sheet 13. . Similarly, one end of the weir in the longitudinal direction may fall down to the second absorber 16R, 16L side, or may fall down to the side flap 18 side to be joined to the top sheet 13.

The elastic members 30 are joined to the free ends 28 of the pocket sheets 15R and 15L in an extended state. As a result of the first absorber 14 being urged (bent) in an arc shape by the above-described joints 24R and 24L such that the distance between one end and the other end in the longitudinal direction of the first absorber 14 is shortened. End 2 of pocket seat 15R, 15L
8 rises from the first absorber 14, but this elastic member 3
The three-dimensional gathers 3 which can rise more steeply by arranging the zeros and ensure the formation of the weir
1 can be formed.

Although it is possible to omit the elastic member 30 described above, when the elastic member 30 is employed as in this embodiment, the pocket sheet 15 having the opening 25 is formed.
It is preferable to dispose it over the entire area of the free end 28 of R and 15L, but it is also possible to arrange only a part of the center. Further, in the present embodiment, one elastic member 30 is respectively joined to the free ends 28 of the pocket sheets 15R and 15L, but a plurality of elastic members 30 can be joined.

Thus, the pair of pocket sheets 1
Except for one end of each of the 5R and 15L, that is, the center in the width direction except for the back side, the free ends 28 are separated from each other, and further separated from the surface of the top sheet 13 and three sides are formed by the pocket sheets 15R and 15L. An enclosed opening 25 and a weir 29 bordering the opening 25 are formed.

The opening 25 is not particularly limited as long as the excrement is excreted on the upper surface of the first absorber 14 through the opening 25. However, preferably, the length of the pocket sheets 15R and 15L apart from each other is 3/5 to 5/5 of the dimension along the longitudinal direction of the first absorber 14.
A length of about 9/10 is common. The distance apart from each other is 3 of the dimension along the longitudinal direction of the first absorber 14.
If the ratio is less than / 5, the opening 25 becomes too small, so that the excrement does not easily enter the opening 25.
If it exceeds 9/10 of the dimension along the longitudinal direction of
It may be insufficient to obtain the effect of preventing leakage from the back side.

A method for easily realizing the structure of this embodiment will be described with reference to FIGS. Joint 2
As shown in FIG. 4 showing the appearance before forming the 4R, 24L and FIG. 5 showing the cross-sectional structure taken along the line VV, arc-shaped portions from the center in the longitudinal direction to the abdomen of each pocket sheet 15R, 15L. A pair of adhesive parts 24RO, 24RI and 24LO, 24LI are arranged on each pocket sheet 15R, 15L with the second absorbers 16R, 16L formed therebetween. Further, an elastic member 30 is attached to the free end 28 of each of the pocket sheets 15R and 15L.
Are arranged in an extended state, and these bonded portions 24RO, 24RI and 2
4LO and 24LI are overlapped and joined together to form the joints 24R and 24L described above, so that the opening 25
And the folded portion 29 surrounding the second absorbers 16R and 16L and the three-dimensional gathers 31 (see FIG. 3) serving as weirs can be formed at the same time.

In this case, the elastic member 30 which surrounds the opening portion 25 in a curved state along the opening portion 25 is used as a pocket sheet continuous body 15CR, 15
CL can be joined in a straight line along the transport direction of the CL, and there is no need to take special consideration for bending along the opening 25.

That is, a pair of pocket sheets 15R,
The one end in the longitudinal direction of 15L and the side edge on the outer side in the width direction are joined to the top sheet 13, and the joining portions 24R, 24L are formed in the pair of pocket sheets 15R, 15L, thereby forming the widths of the pocket sheets 15R, 15L. The side edge on the inside in the direction is arranged to be curved outward along the longitudinal direction,
The pocket sheets 15R and 15L are shorter than the top sheet 13 and the like by the amount of the folded portion 29,
Since the first absorber 14 is pulled in the longitudinal direction, the first absorber 14 is bent in an arc shape with respect to the pocket sheets 15R and 15L, and as a result, the free ends 28 of the pocket sheets 15R and 15L stand up from the first absorber 14. State. Furthermore, by arranging the elastic member 30 in an extended state at the free end portions 28 of the pair of pocket sheets 15R and 15L, the linear distance between one longitudinal end and the other end of the first absorber 14 is reduced. Furthermore, as a result of the first absorber 14 being urged in an arc shape, the free ends 28 of the pocket sheets 15R, 15L can be steeply raised from the first absorber 14. Moreover, the first absorber 1 is provided inside the three-dimensional gather 31.
The second absorbers 16R and 16L along 4 can be arranged.

The height of the weir at the free end 28 of the pocket sheets 15R, 15L rising from the joints 24R, 24L is within the range of 5 mm to 100 mm, preferably 20 mm to 60 mm.
It is preferable to set in the range of mm. Although the height of the weir differs depending on the wearer's body type and the type of absorbent article, if the height of the weir is less than 5 mm, leakage at the crotch cannot be sufficiently prevented. If the height is higher than 100 mm, the weir portion will be interposed between the first absorber 14 and the wearer, depending on the wearing method and posture of the wearer, and the first absorber 14
Function may not be able to be exhibited.

The pocket seat 15 used in the present invention
R and 15L are hydrophilic or hydrophobic non-woven fabric, woven fabric,
In addition to a porous plastic film or the like, a liquid impermeable film or a film obtained by laminating these films can be used. Further, a hydrophilic nonwoven fabric or a woven fabric can be used as it is, but it is more preferable to perform a water-repellent treatment, whereby the leakage preventing effect can be enhanced. The fibers constituting the nonwoven fabric and the woven fabric may be fibers such as polypropylene, polyethylene, polyester and nylon, or composite fibers combining two or more kinds of polyester, polypropylene, polyethylene and nylon. In particular, low-melting polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred from the viewpoint of strength, but are not limited thereto.
It is also possible to use an elastic material.

Further, a wide sheet is used as the above-mentioned top sheet 13 (including the center top sheet and / or the side top sheet), and the portions extending from both side edges of the first absorber 14 are placed on the first absorber 14. The pocket portions 15R and 15L may be formed at the folded portions. Also in this case, by applying a water-repellent treatment to the folded portion, the leakage preventing effect can be further enhanced.

Further, the above-mentioned waist elastic member 2
0, the leg elastic member 22, and the elastic member 30 are made of natural rubber, synthetic rubber, urethane, or the like, which are formed into a thread, string, or tape, and are soluble in starch, water-soluble such as CMC (carboxymethylcellulose). However, it may be fixed by heat welding or ultrasonic welding.

In this embodiment, the pocket sheets 15R, 1R
Although a pair of three-dimensional gathers 31 is formed in the crotch part by 5L, a plurality of pairs of three-dimensional gathers may be formed. In this case, the three-dimensional gathers 31 are
May be formed outside the free end portion 28, that is, outside the weir in the width direction.

The above-mentioned joints 24R and 24L and the three-dimensional gathers 31 can be efficiently manufactured during the manufacture of the unfolded diaper 11, and an example of a manufacturing procedure of such unfolded diaper 11 is shown in FIG. 8 to FIG. That is, for the continuous body 11C of the unfolded diaper in the state shown in FIG. 4 which is cut along the cutting line D indicated by the two-dot chain line, the free edge portion 2 of the continuous body 15CR, 15CL of the pocket sheet is provided.
8, a pair of elastic members 31 are joined in an extended state. In addition, pocket sheet continuum 15CR, 15CL
, The second absorbers 16R and 16L are arranged at predetermined intervals. Furthermore, a continuous body of pocket sheets 15CR, 1
Adhesive portions 24RO, 24LO, 24RI, and 24LI are set on the 5CL, and an adhesive is applied to only one of these joints (in the illustrated example, the outer adhesive portions 24RO and 24LO in the width direction) (FIG. 6). ), Pocket sheet continuum 15CR
In FIG. 6, which is set at the same distance from the bonding parts 24RO and 24RI,
The folded line LR indicated by the one-dot chain line, that is, the unfolded diaper continuum 11C centered on the vicinity of the widthwise inner edge of the second absorber 16R on the continuum 15CR of one pocket sheet.
One side (the right side in the figure) is folded in a valley fold. As a result, the joining portion 24R of the continuous body 15CR of the pocket sheet
And the three-dimensional gathers 31 are automatically formed (see FIG. 7). At this time, in order to prevent the side flap portion 18 from being bonded to the bonding portion 24LO of the left pocket sheet 15L, at the same time as performing the valley fold at the return line LR,
It is necessary to fold the flap portion 18 outward by mountain fold. Such simultaneous folding is possible by using two bending plates of the folding device. However, in order to simplify the folding device, the diaper may not be provided with a ventral flap.

Similarly, a continuous body 11C of the unfolded diaper
In FIG. 7, the other side (the left side in the figure) is set at the same distance from the bonding portions 24LO and 24LI of the continuum 15CL of the other pocket sheet, the fold line LL indicated by the dashed line in FIG. 2nd absorber 1 on body 15CL
The other side of the continuous type diaper 11C is folded in a valley fold around the vicinity of the inner edge in the width direction of 6L, and the folded portion enclosing the joining portion 24L and the second absorber 16L of the continuous body 15CL of the other pocket sheet. The part 29 and the three-dimensional gathers 31 are automatically formed to form a continuous body 11C of the unfolded diaper in a three-folded state as shown in FIG. 8 and cut along the cutting line D to obtain the unfolded diaper 11. Then, it is folded in two or three in the longitudinal direction, packed, and shipped.

At this time, a configuration in which the deployable diapers 11 adjacent to each other along the longitudinal direction of the deployable diaper continuous body 11C may be arranged in the same direction, but as shown in the drawing, in the longitudinal direction of the deployable diaper continuous body 11C. Expandable diapers 11 adjacent along
It is preferable that the back side and the back side, and the abdomen side and the abdomen side are continuous with each other in such a manner that the directions are alternately arranged in opposite directions. As in the present embodiment, when the adjacent deployable diapers 11 are alternately arranged in the longitudinal direction in the opposite direction, the edge portions of the bonding portions 24R and 24L of the adjacent deployable diapers 11 are respectively attached to the deployable diapers 11. It is not necessary to make it fit exactly with the cut portion D, and no defective product is produced even if the positions of the joint portions 24R and 24L are slightly shifted during manufacturing, so that high-speed manufacturing is possible.

In this manner, the pocket sheet 15R,
When 15L is formed, the opening 25 formed even if the elastic members 30 of the pocket sheets 15R and 15L are arranged in a straight line along the flow direction of the production line becomes U-shaped, and substantially the entire opening 25 is formed. The three-dimensional gathers 31 which are three-dimensionally curved and serve as weirs while being easy to manufacture are provided with the first absorber 1.
Thus, it is possible to manufacture the deployable diaper 11 which can be reliably raised from the side edge in the width direction of the diaper 4.

The pocket sheets 15R, 15L enclosing the second absorbers 16R, 16L do not need to be bonded to the folded portion 29 over the entire surface. However, the second absorbers 16R, 16L are used to prevent peeling of pulp and SAP. 24R, 24 of the pocket sheets 15R, 15L over the entire circumference of
It is desirable to join the L and the abdomen.

In the above-described embodiment, the above-described joints 24R and 24L are formed in the joint regions between the top sheet 13 and the pocket sheets 15R and 15L.
R, 24L on the leg elastic member 22 or the top sheet 1
It is also possible to form them on the pocket sheets 15R, 15L inside the joint area between the third and the pocket sheets 15R, 15L.

FIG. 9 shows a cross-sectional structure similar to FIG. 3 in another embodiment of the absorbent article according to the present invention. Elements having the same functions as those in the previous embodiment are denoted by the same reference numerals. Stop and duplicate description will be omitted. In the present embodiment, the width of the top sheet 13 is set short,
Side flap portions 17 and 18 are formed by the widthwise outer portions of the pocket sheets 15R and 15L and the back sheet 12, and the leg elastic members 22 are sandwiched. That is,
Leg elastic member 2 for forming leg gather 21
2 is a pocket seat 15R, 15L and a back seat 1
2 and fixed between them. Pocket seat 15R, 1
The widthwise outer edge of 5L is joined to the top sheet 13 and the back sheet 12, and the joining portion 24 between the pocket sheets is formed.
R and 24L (FIG. 9 shows only one joint 24R) are formed with a wider joint than in the previous embodiment.

As described above, by separating the positions of the joints 24R and 24L from the first absorber 14, the opening 25 can be further widened, and the gap between the second absorbers 16R and 16L and the three-dimensional gather 31 can be increased. By forming a wider interval than that of the embodiment, the space can be used as a reservoir for excrement.

In the above embodiment, the pocket sheet 15
R, 15L joints 24R, 24L to topsheet 13
Although formed above, it is also possible to form these joints 24R and 24L apart from the top sheet 13.

FIG. 10 shows a cross-sectional structure of still another embodiment of the absorbent article according to the present invention. Elements having the same functions as those of the previous embodiment are denoted by the same reference numerals.
Duplicate description will be omitted. That is, FIG.
Is a sectional view corresponding to FIG. 3 in the previous embodiment,
The width dimension of the top sheet 13 is set to be short, the side flap portions 17 and 18 are formed by the width direction outer portions of the pocket sheets 15R and 15L and the back sheet 12, and the leg elastic members 22 are sandwiched. The base end of the three-dimensional gather 31, that is, the joint 2 of the pocket sheets 15R and 15L.
4R, 24L (only one joint is shown in FIG. 10) are the top sheet 13 and the pocket sheet 15R,
15L, the pocket sheet 15R, 1
5L are formed to be shifted inward in the width direction, thereby forming the second absorbers 16R and 16L and a part of the three-dimensional gather 31, and a pocket sheet between the second absorbers 16R and 16L and the top sheet 13. By using 15R and 15L, this can be used as a reservoir. In this case, it is also possible to further arrange an elastic member at the portions of the second absorbers 16R and 16L.

The structures of the three embodiments shown in FIGS. 3, 9, and 10 described above are arbitrarily selected by simply shifting the formation positions of the joints 24R and 24L along the width direction of the pocket sheets 15R and 15L. It is possible, and a diaper having such a configuration can be manufactured with almost no modification of the manufacturing equipment.

In order to further enhance the effect of preventing leakage from the back side of the deployable diaper 11, it is also effective to overlap the auxiliary sheet with one of the longitudinal ends of the pocket sheets 15R and 15L. FIG. 11 shows the appearance of such another embodiment according to the present invention. Elements having the same functions as those of the previous embodiment are denoted by the same reference numerals, and duplicate description is omitted.

That is, the pocket sheets 15R, 15L
The auxiliary sheet 32 is superimposed on one end in the longitudinal direction of and is integrally joined thereto. Thus, by providing the auxiliary sheet 32, it is possible to more reliably prevent leakage from the back side of the deployable diaper 11.

The auxiliary sheet 32 is a pocket sheet 15
Although the same material as R and 15L can be used, another material may be used. In this case, a stretchable material or a non-stretchable material may be used. When an elastic material is used, the elastic member 19 can be omitted by disposing the elastic material in an extended state.

The length of the auxiliary sheet 32 along the longitudinal direction of the first absorber 14 varies depending on the type and size of the absorbent article, but is generally set within a range of 10 mm to 200 mm. , Preferably in the range of 30 mm to 150 mm. If the length of the auxiliary sheet 32 is less than 10 mm, the effect of preventing leakage from the back side is not exhibited, and
If it is larger than 0 mm, the opening 25 will be closed and cover the first absorber 14, and the absorption performance of the first absorber 14 will be impaired.

As described above, by providing the auxiliary sheet 32, it is possible to more reliably prevent leakage from the back side of the deployable diaper 11. Furthermore, pocket seat 1
Even if the overlapping portion on the back side of 5R and 15L becomes insufficient, it is possible to reliably prevent leakage from the back side.

The auxiliary sheet 32 may be provided over the entire area of the side flap portion 17. In this embodiment, the auxiliary sheet 32 is attached to the pocket sheet 15R,
Although it is arranged to overlap on 5L, it may be interposed between the top sheet 13 and the pocket sheets 15R and 15L. Top sheet 13 and pocket sheet 15R,
Even when the auxiliary sheet 32 is interposed between the auxiliary sheet 32 and the auxiliary sheet 32, the auxiliary sheet 32 is joined to the pocket sheets 15R and 15L, and a gap can be formed between the top sheet 13, that is, the first absorber 14 and the auxiliary sheet 32. It is desirable to do so. In the present embodiment, the auxiliary sheet 32 is the first absorber 1
Although it is arranged only partially in the width direction of 4, it may be arranged over the entire width.

[0069]

According to the absorbent article of the present invention, at least one longitudinal end of the pair of pocket sheets is overlapped with at least one longitudinal end of the top sheet in a state where the side edges on the inner side in the width direction are overlapped with each other. An opening and a weir are formed by joining and separating the widthwise inner side edges of the pair of pocket sheets from the joined portion at one longitudinal end to the other end of the pair of pocket sheets from each other, Regardless of the posture of the wearer, the excrement of the wearer is received by the first absorbent body from the opening, and leakage of the excrement not only from the crotch portion but also from the back side is surely prevented by the weir, and these excretions are removed. It can be kept separate. As a result, it is possible to prevent dermatitis and the like from occurring.

Further, since the pair of second absorbers projecting from the outer side edge of the pocket sheet in the width direction to the first absorber side are attached to the pocket sheet along the longitudinal direction of the opening, the inside of the pocket structure is provided. In this state, the pair of second absorbers is disposed, so that the effect of preventing leakage from the crotch can be significantly enhanced.

In the case where the pocket sheet is provided with a joint formed by folding the pocket sheet outward in the width direction from the central portion in the longitudinal direction to the abdominal portion of the pocket sheet, the pocket sheet extends from the peripheral portion of the first absorber to the pocket sheet. The rising tendency of the side edge portion on the inner side in the width direction is further strengthened, and the weir can be reliably formed.

Similarly, an elastic member may be arranged in an extended state along the widthwise inner side edges of the pair of pocket sheets,
Alternatively, even when the pair of pocket sheets themselves are formed of a stretchable member, the side edges on the widthwise inside of the pocket sheet rise from the peripheral edge of the absorber using the contracting force of the elastic member or the stretchable member. As a result, the weir can be reliably formed.

Further, when an auxiliary sheet to be superimposed on one end in the longitudinal direction of the pair of pocket sheets is provided,
Leakage from the back side of the absorber can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an embodiment in which an absorbent article according to the present invention is applied to a deployable diaper.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a plan view showing a state before joining the pocket sheets in the embodiment shown in FIG. 1;

FIG. 5 is a sectional view taken along the line VV in FIG. 4;

FIG. 6 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 7 and FIG.

FIG. 7 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 6 and FIG.

FIG. 8 is a conceptual diagram showing a manufacturing procedure of the embodiment shown in FIG. 1 together with FIG. 7 and FIG.

FIG. 9 is a sectional view similar to FIG. 3, showing a structure of a main part of another embodiment of the absorbent article according to the present invention.

FIG. 10 is a sectional view similar to FIG. 3, showing a structure of a main part of another embodiment of the absorbent article according to the present invention.

FIG. 11 is a perspective view showing the appearance of another embodiment in which the absorbent article according to the present invention is applied to a deployable diaper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Unfolded diaper 11C Unfolded diaper continuum 12 Backsheet 13 Topsheet 14 1st absorber 15R, 15L Pocket seat 15CR, 15CL Pocketsheet continuum 16R, 16L 2nd absorber 17, 18 Side flap part 19 Waist Gather 20 Elastic member around waist 21 Leg gather 22 Elastic member around leg 23 Fastening tape 24R, 24L Joint 24RO, 24RI, 24LO, 24LI Adhesive part 25 Opening 26 Cutout 27 Base tape 28 Free end 29 Folding part 30 Elastic member 31 solid gather 32 auxiliary sheet D cutting line LR, LL folded line

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3B029 BD12 BD13 BD14 BD17 BD19 4C003 AA02 DA04 EA03 HA05 4C098 AA09 CC10 CC12 CC15 CC16 CE06 DD10 DD25 DD26 DD27 DD28 DD30

Claims (6)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, a first absorber disposed between the top sheet and the back sheet, and a first absorbent body extending in a longitudinal direction of the first absorbent body. An absorbent article comprising: a pair of pocket sheets arranged along and having a widthwise outer side edge joined to at least one of the top sheet and the back sheet, wherein the pair of pocket sheets Is joined to at least one longitudinal end of the top sheet in a state where the widthwise inner side edges are overlapped with each other, and from the joint of the longitudinal end of the pair of pocket sheets. An opening is formed in which the widthwise inner side edges of the pair of pocket sheets reaching the other end are separated from each other, from the widthwise outer side of the pair of pocket sheets to the first absorber side. An absorbent article, wherein a pair of projecting second absorbers is attached to the pocket sheet along a longitudinal direction of the opening. 2. A joint portion in which the inside of the pair of pocket sheets in the width direction is folded back to the outside thereof and joined to each other is provided, and the opening is formed by these joint portions. The absorbent article according to claim 1, wherein 3. The absorbent article according to claim 2, wherein a second absorbent body is accommodated in each of the folded portions of the joint. 4. The absorbent article according to claim 1, wherein an elastic member is disposed along a longitudinal direction at a side edge of the pair of pocket sheets on an inner side in a width direction. . 5. The absorbent article according to claim 1, wherein each of the pair of pocket sheets is formed of an elastic member. 6. The absorbent article according to claim 1, further comprising an auxiliary sheet superimposed on one end in the longitudinal direction of said pair of pocket sheets.